One based on ag/ppy/mno 2 Stretchable asymmetric supercapacitor and preparation method thereof

A supercapacitor, asymmetric technology, used in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of insufficient stretchability, complex manufacturing process, limited practical application, etc., and achieve good flexibility and mechanical properties. , The effect of improving electrical performance and good flexibility

Active Publication Date: 2019-07-09
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, existing stretchable capacitors face low energy density, insufficient stretchability, and complex manufacturing processes, which limit their practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The specific preparation process is as follows: 1) 0.05g of silver nitrate, 0.2g of polyvinylpyrrolidone (PVP) and 0.02g of acetate were sequentially added into 20mL of water and stirred. Subsequently, the mixed solution was stirred at room temperature for 30 min, and 0.25 mL of pyrrole monomer and 10 mL of 0.3 mol / L ferric chloride aqueous solution were respectively added through a peristaltic pump at a speed of 600 μL / min, and the reaction was continued for 2 h. The obtained product was washed more than 3 times, and then added to 20 mL of 0.6 mmol / L potassium permanganate solution, and reacted at 120° C. for 2 h. 2) The synthesized Ag / PPy / MnO 2 Composite nanomaterials for cleaning and Ag / PPy / MnO 2 The preparation of the granules, the specific method is: the obtained product is washed more than 3 times by centrifugation at 10,000 rpm for 10 minutes with ethanol, then it is dispersed in absolute ethanol, and its mass fraction reaches 60%, and it is passed through an ov...

Embodiment 2

[0023]The specific preparation process is as follows: 1) 0.5g of silver nitrate, 2.0g of polyvinylpyrrolidone (PVP) and 0.2g of acetate were sequentially added into 200mL of water and stirred. Subsequently, the mixed solution was stirred at room temperature for 30 min, and 2.5 mL of pyrrole monomer and 100 mL of 0.3 mol / L ferric chloride aqueous solution were added through a peristaltic pump at a speed of 600 μL / min, and the reaction was continued for 2 h. The obtained product was washed more than 3 times, and then added to 200 mL of 0.6 mmol / L potassium permanganate solution, and reacted at 120° C. for 2 h. 2) The synthesized Ag / PPy / MnO 2 Composite nanomaterials for cleaning and Ag / PPy / MnO 2 The preparation of the granules, the specific method is: the obtained product is washed more than 3 times by centrifugation at 10,000 rpm for 10 minutes with ethanol, then it is dispersed in absolute ethanol, and its mass fraction reaches 60%, and it is passed through an oven at 60 Dry ...

Embodiment 3

[0025] The specific preparation process is as follows: 1) 0.08g of silver nitrate, 0.32g of polyvinylpyrrolidone (PVP) and 0.032g of acetate were sequentially added into 30mL of water and stirred. Subsequently, the mixed solution was stirred at room temperature for 30 min, and 0.4 mL of pyrrole monomer and 16 mL of 0.3 mol / L ferric chloride aqueous solution were respectively added through a peristaltic pump at a speed of 600 μL / min, and the reaction was continued for 2 h. The obtained product was washed more than three times, and then added to 32 mL of 0.6 mmol / L potassium permanganate solution, and reacted at 120° C. for 2 h. 2) The synthesized Ag / PPy / MnO 2 Composite nanomaterials for cleaning and Ag / PPy / MnO 2 The preparation of the granules, the specific method is: the obtained product is washed more than 3 times by centrifugation at 10,000 rpm for 10 minutes with ethanol, then it is dispersed in absolute ethanol, and its mass fraction reaches 60%, and it is passed through ...

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Abstract

The invention relates to a preparation method of an extensible asymmetric supercapacitor based on Ag / PPy / MnO2 composite nano-materials. The preparation method is characterized in that the prepared Ag / PPy / MnO2 composite nano-materials have the advantages of excellent capacitive performance, preferable flexibility, high stability, low cost and preferable printability; extensible fabric base materials with super flexibility are selected; and by means of a screen printing mode, silver paste, the synthetic Ag / PPy / MnO2 composite nano-materials, active carbon and PVA-Na2SO4 solid electrolyte are printed into a flexible solid state asymmetric supercapacitor. The energy density of the asymmetric supercapacitor prepared by the preparation method can achieve 30.9 mu Wh cm-2; after 2,5000 times of constant current charge and discharge, the capacitance retention rate of the asymmetric supercapacitor is 90.8%; after 40% of extension, the capacitance retention is 89.2%; and at the same time, the prepared asymmetric supercapacitor can maintain preferable flexibility and mechanical performance under different flexible conditions (extension, warping, curving and bending), and a red 2.8V LED lamp canbe lightened under the above conditions.

Description

technical field [0001] The present invention relates to a kind of based on Ag / PPy / MnO 2 Stretchable asymmetric supercapacitors based on composite nanomaterials and their fabrication methods. Background technique [0002] Supercapacitor (Supercapacitor) is a new type of energy storage device, which has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection, so supercapacitors are widely used. Due to the increasing shortage of petroleum resources, and the pollution of the environment by exhaust emissions from internal combustion engines burning petroleum is becoming more and more serious (especially in large and medium-sized cities), the increase of solid particles in the air has a great impact on the human body, and people are studying alternatives. New Energy Devices for Internal Combustion Engines. Research and development of hybrid power, fuel cells, and chemical battery products and app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/48H01G11/86H01G11/34
CPCY02E60/13
Inventor 吴伟刘力
Owner WUHAN UNIV
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